If there was an unruly passenger on board, how could pilots remedy the situation?

 If there was an unruly passenger on board, how could pilots remedy the situation? Другой вариант вопроса: Imagine there is an aggressive passenger on board. Flight attendants ask for your help? What would you do?

remedy - исправлять, устранять (рЭмиди)

Pilots can report to ATC about this situation and call the police. The police will meet a disruptive passenger after arrival. In a serious case the flight can be diverted to an alternative. Unruly and disruptive passenger events are a real challenge and continuing concern for airlines worldwide. In order to limit these situations airline restrict alcohol consumption and develop strict rules, because unruly passengers are real threat to safety and comfort on board.

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